Nests & setups

Outworld

Definition

The open area of a formicarium, connected to the nest, where workers go out to find food and water, drop their waste and explore, just as they would forage outside their nest in nature.

Also known asoutworlds
Medium acrylic outworld with clear walls, a white 3D-printed lid and entrance ports to connect a nest

An outworld is the "outside" of an ant setup. While the nest is dark, humid and private, the outworld is an open, brighter area connected to it, where the workers come out to forage, collect food and water, and leave their waste. It's also where you'll do most of your feeding and cleaning, without disturbing the queen.

An outworld can be very simple. In a tubs and tubes setup, it's just a plastic container with a test tube inside. It can also be a dedicated acrylic or glass box with entrance ports for tubing, a lid with a handle and a flat panel for escape prevention oil. Many all-in-one nests include a small built-in outworld.

I love watching my Tetramorium caespitum workers explore the sand and rocks in their outworld. It's where you see the most action: scouts searching, trails forming and the whole colony rushing to a fresh cricket.

In practice

  • Always use an escape barrier. A horizontal top panel for the oil works best, because the ants would have to climb upside down to get out.
  • Close unused ports with proper stoppers, as some species can chew through cotton.
  • Add a thin substrate like washed sand if you like, but keep it easy to clean.
  • Place liquid feeders and protein in the outworld, not in the nest, and remove leftovers before they go moldy.

Related terms

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